On 03/23/2018 09:05 PM, Andrey Konovalov wrote:
> diff --git a/mm/kasan/khwasan.c b/mm/kasan/khwasan.c
> index 24d75245e9d0..da4b17997c71 100644
> --- a/mm/kasan/khwasan.c
> +++ b/mm/kasan/khwasan.c
> @@ -39,6 +39,57 @@
> #include "kasan.h"
> #include "../slab.h"
>
> +int khwasan_enabled;
This is not unused (set, but never used).
> +
> +static DEFINE_PER_CPU(u32, prng_state);
> +
> +void khwasan_init(void)
> +{
> + int cpu;
> +
> + for_each_possible_cpu(cpu) {
> + per_cpu(prng_state, cpu) = get_random_u32();
> + }
> + WRITE_ONCE(khwasan_enabled, 1);
> +}
> +
